Для растяжения пружины на 5см. необходимо приложить силу 2Н. Какую работу нужно совершить, чтобы растянуть эту пружину на 30см? - №12676493

Для растяжения пружины на 5см. необходимо приложить силу 2Н. Какую работу нужно совершить, чтобы растянуть эту пружину на 30см?
- Предмет:
  Физика
- Автор:
  skunk
- 6 лет назад

Ответы 1

F=k*xF1/F2=x1/x2F2=F1*x2/x1=2*30/5=12 H
- Автор:
  conan
- 6 лет назад
- 0
Добавить свой ответ

Еще вопросы

51. I am busy at the moment. I ... on the computer.
a) work
b) worked
c) am working
d) have been working
52. We ... to Odessa for our holidays last year.
a) goes
b) going
c) have gone
d) went
53. People ... English all over the world.
a) speaks
b) speak
c) has spoken
d) had spoken
54. I ... any of Shakespeare's plays yet.
a) hadn't read
b) didn't read
c) haven't read
d) was reading
55. At this time tomorrow we ... over the Atlantic.
a) flie
b) shall be flying
c) fly
d) flied
56. There was no money left because we ... it all.
a) spent
b) had spent
c) had been spending
d) spend
57. I shall tell him the news when he … me.
a) joined
b) joins
c) will join
d) join
58. You … some silly remarks when I’m speaking.
a) always made
b) are always making
c) were always making
d) will always make
59. By the time you receive this letter I … my final exams.
a) shall finish
b) will have finished
c) finish
d) have finished
60. «How long … for this company?» «Five years».
a) had you worked
b) were you working
c) have you been working
d) do you work
61. Pineapples ... in Hawaii.
a) are growing
b) is grown
c) are grown
d) grew
62. This book ... in New-York last year.
a) was published
b) will be published
c) published
d) will publish
63. Talking ... at the lessons.
a) are not allowed
b) is not allowed
c) does not allow
d) is not being allowed
64. This island ... two hundred years ago.
a) were discovered
b) was discovered
c) will be discovered
d) discovered
65. French ... in France, Belgium and Switzerland.
a) speaks
b) spoke
c) is spoken
d) is speaking
66. The students ... in research during the laboratory class tomorrow.
a) are engaged
b) will engage
c) will be engaged
d) have been engaged
67. A tree ... by its fruit.
a) are known
b) know
c) knows
d) is known
68. This question ... many times already and it is still under consideration.
a) was raised
b) have been raised
c) has been raised
d) will be raised
69. The tests … yet.
a) haven't been checked
b) hasn’t been checked
c) weren’t checked
d) haven’t checked
70. This question … at once.
a) must discuss
b) must be discussed
c) must have discussed
d) must being discussed
71. Will she be upset if she ... the news ?
a) heard
b) is hearing
c) hears
d) had heard
72. If he drops out of college he ... to look for a job.
a) have
b) should have
c) will have
d) would have
73. If I ... a computer, I would use the Internet.
a) had
b) have
c) has
d) has got
74. We ... everything if we had known how to do it.
a) would have done
b) would do
c) should do
d) will do
75. I wish they ... the mistake earlier.
a) discovered
b) had discovered
c) would discover
d) will discover
76. You ... be ready to answer all my questions.
a) need
b) must
c) ought
d) have
77. I ... to meet my brother at the station.
a) can
b) should
c) may
d) have
78. However hard 1 tried, I ... finish the work in time.
a) can’t
b) mustn’t
c) couldn’t
d) may not
79. We ... wait for her any longer.
a) can
b) must
c) can’t
d) should
80. ... you start working immediately?
a) Have
b) Can
c) May
d) Ought
81. ... I ask you to do me a favour?
a) May
b) Will be able
c) Have
d) Am
82. You ... follow my advice. There is no other way out for you.
a) can
b) must
c) may
d) ought
83. The lecturer ... speak so fast.
a) should
b) must
c) has
d) shouldn’t
84. To succeed one ... do something.
a) is
b) must
c) ought
d) has
85. He … pay more attention to his English.
a) ought
b) should
c) has
d) must have
86. I thought you … be glad to know about it.
a) might
b) can
c) must
d) ought
87. They … paid no attention to it.
a) must have
b) need
c) can’t have
d) ought
88. Come and help me ... the shopping.
a) to do
b) did
c) done
d) doing
89. The door was left....
a) unlock
b) unlocking
c) unlocked
d) being unlocked
90. After ... school she was going to enter Uman National University of Horticulture.
a) finish
b) being finished
c) finishing
d) having finished
91. She greatly dislikes … by anybody.
a) contradicting
b) contradict
c) having contradicted
d) being contradicted
92. She is fond of... English songs.
a) to sing
b) sung
c) having sung
d) singing
93. This book is worth … .
a) to buy
b) bought
c) having bought
d) buying
94. He made us … for several hours.
a) to wait
b) waited
c) wait
d) to be waiting
95. He was very … by her sudden change of attitude.
a) surprised
b) surprising
c) to surprise
d) surprise
96. I shall never forget … to America for the first time.
a) go
b) going
c) gone
d) have gone
97. I look forward to … you at the party.
a) to see
b) see
c) seen
d) seeing
98. He expected … to the party, but he wasn’t.
a) to invite
b) to be invited
c) invite
d) invited
99. Generally …, I don’t like coffee.
a) to speak
b) speaking
c) spoken
d) speak
100. I can’t help … why Larry did such a foolish thing.
a) wondering
b) to wonder
c) wondered
d) to be wondered
- Предмет:
  Английский язык
- Автор:
  cannolilaht
- 6 лет назад
- Ответов:
  
  1
- Смотреть
Некоторое расстояние автомобиль преодолел в гору со скоростью 42 км/ч, а с горы — со скоростью 56 км/ч. Какова средняя скорость движения автомобиля на всём участке пути?
- Предмет:
  Математика
- Автор:
  daffodil
- 6 лет назад
- Ответов:
  
  1
- Смотреть
середина ребра куба со стороной 6 является центром шара радиуса 3. найдите S части поверхности шара, лежащей внутри куба. в ответе надо записать S/pi
- Предмет:
  Математика
- Автор:
  jamal
- 6 лет назад
- Ответов:
  
  1
- Смотреть
Сколько лет Клеопатре?
- Предмет:
  История
- Автор:
  pedroklein
- 6 лет назад
- Ответов:
  
  0
- Смотреть

How much to ban the user?

1 hour 1 day 100 years